Effectively prevent backflow of blood， so prolonged erection!! 

This product is suitable for penile erection is longer than 9 cm users. This product is made ​​of stainless steel and leather production， from one large and one small two penis rings and leather straps attached to the large ring diameter 5CM， small ring diameter 3CM. When you use the small collar on erection penis， big collar roots in balls， effectively extending the erection time， increase male sexy. 

Male genital worship complex， even today also left deep traces in the minds of modern men and women. Both men and women， mostly be strong and hot penis with a kind of reverence and admiration psychology. This product is a commodity SM accessories and men between the root of worship between the use of the metal rings in turn put yet erect penis， then hand the penis erection (maximum ring used to trap the scrotum)， which can effectively prevent backflow of blood so prolonged erection 

 

The following is a physical map